As modern SSD chips began to to exceed this speed of the SATA interface a new interface was developed. M.2 is a new connector type that is physically on the surface of some new motherboards. It can be run with drives that are one of two different modes (SATA or PCIe). If the M.2 drive is a SATA mode drive the data is still routed through the motherboards SATA controller and it is still limited to 6gb/sec

If the drive is a PCIe type M.2 drive, like we sell, it becomes part of the native PCIe bus on the system and has a maximum potential throughput of up to 32gb/sec. To get this higher transfer rate, drive needs to be PCIe type and Windows 8.1 or Windows 10 is required.